本文实例讲述了C#实现下载网页HTML源码的方法。分享给大家供大家参考之用。具体方法如下：
public static class DownLoad_HTML{private static int FailCount = 0; //记录下载失败的次数 public static string GetHtml(string url) //传入要下载的网址{string str = string.Empty;try{System.Net.WebRequest request = System.Net.WebRequest.Create(url);request.Timeout = 10000; //下载超时时间request.Headers.Set("Pragma", "no-cach<mark>来源gaodaimacom搞#^代%!码网</mark>e");System.Net.WebResponse response = request.GetResponse();System.IO.Stream streamReceive = response.GetResponseStream();Encoding encoding = Encoding.GetEncoding("gb2312");//utf-8 网页文字编码System.IO.StreamReader streamReader = new System.IO.StreamReader(streamReceive, encoding);str = streamReader.ReadToEnd();streamReader.Close();}catch (Exception ex){FailCount++; if (FailCount > 5){var result = System.Windows.Forms.MessageBox.Show("已下载失败" + FailCount + "次，是否要继续尝试？" + Environment.NewLine + ex.ToString(), "数据下载异常", System.Windows.Forms.MessageBoxButtons.YesNo, System.Windows.Forms.MessageBoxIcon.Error);if (result == System.Windows.Forms.DialogResult.Yes){str = GetHtml(url);}else{System.Windows.Forms.MessageBox.Show("下载HTML失败" + Environment.NewLine + ex.ToString(), "下载HTML失败", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);throw ex;}}else{str = GetHtml(url);}} FailCount = 0; //如果能执行到这一步就表示下载终于成功了return str;}
希望本文所述对大家的C#程序设计有所帮助
更多c#中过滤html的正则表达式相关文章请关注搞代码！
搞代码网（gaodaima.com）提供的所有资源部分来自互联网，如果有侵犯您的版权或其他权益，请说明详细缘由并提供版权或权益证明然后发送到邮箱[email protected]，我们会在看到邮件的第一时间内为您处理，或直接联系QQ：872152909。本网站采用BY-NC-SA协议进行授权
转载请注明原文链接：c#中过滤html的正则表达式
转载请注明原文链接：c#中过滤html的正则表达式
